Following a record in 2011 (see separate entry/discussion topic on Bonelli's vs Western Bonelli's Warbler)
2013 - One on Ramsey 8 - 10 Sept (GM et al) accepted by BBRC.
2017 - One Skomer 30th – 31 Aug (SP, ES) accepted by BBRC as Bonelli's sp.
2017 - One Skokholm on 24 Sept (TWi, SW, RB et al), accepted by BBRC
2018 - Single Skomer on 16th Sept (ES et al). Unfortunately the bird did not call. Accepted by BBRC as Bonelli's sp.
Records extracted from the Pembrokeshire and Welsh Bird Reports